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Give the various uses of sodium hydroxid...

Give the various uses of sodium hydroxide, NaOH.

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The various uses of sodium hydroxide are as follows:
(i) It is used as a laboratory reagent.
(ii) It is used for preparation of pure fats and oils.
(iii) It is used in the manufacture of soap, paper and number of chemicals.
(iv) It is used in the purification of bauxite.
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